Hiya,
I think you may get some answers from
this very useful table produced by Cross.
1. Cover will completely block LOS when it gets above 30 "density" (cumulative) or if it is 4 "levels" higher. Looking out from cover doesn't affect your LOS - looking THROUGH it is the problem.
2. Opportunity fire decisions are made purely on whether the target unit is visible and whether shots are left(small chance when there are none).
3. Some terrain types do lessen the effect of incoming artillery (soft sand, mud, snow(?), etc)
4. If the target goes to cover yes - if the firer does depends on a bunch of other stuff
5. I don't believe so, other than troops are less likely to flee from cover.
(6.) Once you have pressed
T(arget) use the
N(ext) and
P(revious) keys to cycle through visible targets. (useful keys are displayed on the tool bar at right of screen).
(7.) As long as the vehicle has the carry capacity it can carry troops - no artificial time constraints e.g. the Panzer II (unit#002) has a carry of 6 meaning it can have 6 tank riders in 1937!
Hope this helps.